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黑龙江省春季常有低温冷害发生,给大豆生育带来很大威胁,严重影响大豆品质和产量,对此我们从1986年开始,进行了地膜覆盖对防御大豆冷害技术的研究。试验证明:地膜覆盖能为大豆的生育创造良好的生态环境,具有促熟增产的作用。 地膜覆盖改变了大豆生长的土壤环境条件。土壤温度显著增高。据1987年测定:大豆覆膜后,0—5cm土层日平均增温:4月下旬5.0℃,5月上旬4.3℃,5月中旬4.5℃,5月下旬0.7℃,平均增温3.6℃,前期增温效果明显。经相关分析r=-0.8291,y=6.16
In the spring of Heilongjiang Province, chilling injury often occurs, which brings great threat to the growth of soybean and severely affects the quality and yield of soybean. From 1986 onwards, we carried out the research on the technology of plastic film mulching to prevent cold damage of soybean. Experiments show that: plastic film mulching can create a good ecological environment for the growth of soybean, with the role of promoting ripening and increasing yield. Mulching changes the environmental conditions in which soya grows. Soil temperature is significantly higher. According to the determination in 1987, the average daily temperature increase of 0-5cm soil layer after soybean filming was: 5.0 ℃ in late April, 4.3 ℃ in early May, 4.5 ℃ in mid-May and 0.7 ℃ in late May. The average temperature was increased by 3.6 ℃, Pre-warming effect is obvious. The correlation analysis r = -0.8291, y = 6.16